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From "Joel Bernstein (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-5020) Add finish() method to DelegatingCollector
Date Tue, 10 Sep 2013 18:53:52 GMT

    [ https://issues.apache.org/jira/browse/SOLR-5020?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13763354#comment-13763354
] 

Joel Bernstein commented on SOLR-5020:
--------------------------------------

Simon,

I uploaded a patch to SOLR-5230. I'll test it tomorrow. In the meantime if you have a chance
to test it let me know how it goes.
                
> Add finish() method to DelegatingCollector
> ------------------------------------------
>
>                 Key: SOLR-5020
>                 URL: https://issues.apache.org/jira/browse/SOLR-5020
>             Project: Solr
>          Issue Type: New Feature
>          Components: search
>    Affects Versions: 5.0
>            Reporter: Joel Bernstein
>            Priority: Minor
>             Fix For: 4.5, 5.0
>
>         Attachments: SOLR-5020.patch
>
>
> This issue adds a finish() method to the DelegatingCollector class so that it can be
notified when collection is complete. 
> The current collect() method assumes that the delegating collector will either forward
on the document or not with each call. The finish() method will allow DelegatingCollectors
to have more sophisticated behavior.
> For example a Field Collapsing delegating collector could collapse the documents as the
collect() method is being called. Then when the finish() method is called it could pass the
collapsed documents to the delegate collectors.
> This would allow grouping to be implemented within the PostFilter framework.

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